Patents Assigned to WCA Group LLC
  • Hollow drill rod for slurry application in a geothermal loop
    Patent number: 9291286
    Abstract: A drill rod combination for creating a closed loop geothermal hole in the ground. A combination hollow drill rod and slurry dispenser is connected to a slurry pump and direct slurry through the rod and dispenser while within the geothermal hole. The slurry exits the dispenser surrounding a heat exchange tube removably mounted to the dispenser and left in the hole when the drill rod and dispenser are withdrawn.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: March 22, 2016
    Assignee: WCA Group LLC
    Inventors: Joseph A. Huck, Terry R. Biggs